How to add curve modifier to text?
To use the curve modifer you need to have a curve object.



To create one place the 3d cursor in the same place as your text's origin and press ShiftA to Add->Curve>Bezier Curve.

Select the text and on the curve modifier set the bezier courve as the object to control the distortion for the text.



Editing the curve will allow you to distort and place the text.